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<meta charset="utf-8">
<title>CSS Backgrounds and Borders Module Level 4: parsing background-position-y with valid values</title>
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-4/#propdef-background-position-y">
<meta name="assert" content="background-position-y supports the full grammar '[ center | [ top | bottom | y-start | y-end ]? <length-percentage>? ]#'.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
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<script>
test_valid_value("background-position-y", "center");
test_valid_value("background-position-y", "top");
test_valid_value("background-position-y", "bottom");
test_valid_value("background-position-y", "y-start");
test_valid_value("background-position-y", "y-end");
test_valid_value("background-position-y", "-20%");
test_valid_value("background-position-y", "10px");
test_valid_value("background-position-y", "0.5em");
test_valid_value("background-position-y", "calc(10px - 0.5em)", "calc(-0.5em + 10px)");
test_valid_value("background-position-y", "top -20%");
test_valid_value("background-position-y", "bottom 10px");
test_valid_value("background-position-y", "-20%, 10px");
test_valid_value("background-position-y", "center, top, bottom");
test_valid_value("background-position-y", "0.5em, y-start, y-end");
test_valid_value("background-position-y", "calc(10px - 0.5em), top -20%, bottom 10px", "calc(-0.5em + 10px), top -20%, top 10px");
</script>
</body>
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